Doubly excited ferromagnetic spin-chain as a pair of coupled kicked rotors

Details Doubly excited ferromagnetic spin-chain as a pair of coupled kicked rotors Doubly excited ferromagnetic spin-chain as a pair of coupled kicked rotors

2008-10-02

arxiv.org/abs/0810.0454v3

Physics

Quantum Physics

8 pages, 4 figures; extended appendix and corrected typos

Scientific paper

We show that the dynamics of a doubly-excited 1D Heisenberg ferromagnetic chain, subject to short pulses from a parabolic magnetic field may be analyzed as a pair of quantum kicked rotors. By focusing on the two-magnon dynamics in the kicked XXZ model we investigate how the anisotropy parameter - which controls the strength of the magnon-magnon interaction - changes the nature of the coupling between the two "image" coupled Kicked Rotors. We investigate quantum state transfer possibilities and show that one may control whether the spin excitations are transmitted together, or separate from each other.

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